﻿using System;
using System.Data;
using System.IO;
using System.Xml;

public class XMLProcess
{
    #region 构造函数
    public XMLProcess()
    { }

    public XMLProcess(string strPath)
    {
        this._XMLPath = strPath;
    }
    #endregion

    #region 公有属性
    private string _XMLPath;
    public string XMLPath
    {
        get { return this._XMLPath; }
    }
    #endregion

    #region 私有方法
    /// <summary>
    /// 导入XML文件
    /// </summary>
    /// <param name="XMLPath">XML文件路径</param>
    private XmlDocument XMLLoad()
    {
        string XMLFile = XMLPath;
        XmlDocument xmldoc = new XmlDocument();
        try
        {
            string filename = AppDomain.CurrentDomain.BaseDirectory.ToString() + XMLFile;
            if (File.Exists(filename)) xmldoc.Load(filename);
        }
        catch (Exception e)
        { }
        return xmldoc;
    }

    /// <summary>
    /// 导入XML文件
    /// </summary>
    /// <param name="XMLPath">XML文件路径</param>
    private static XmlDocument XMLLoad(string strPath)
    {
        XmlDocument xmldoc = new XmlDocument();
        try
        {
            string filename = AppDomain.CurrentDomain.BaseDirectory.ToString() + strPath;
            if (File.Exists(filename)) xmldoc.Load(filename);
        }
        catch (Exception e)
        { }
        return xmldoc;
    }

    /// <summary>
    /// 返回完整路径
    /// </summary>
    /// <param name="strPath">Xml的路径</param>
    private static string GetXmlFullPath(string strPath)
    {
        if (strPath.IndexOf(":") > 0)
        {
            return strPath;
        }
        else
        {
            return System.Web.HttpContext.Current.Server.MapPath(strPath);
        }
    }
    #endregion

    #region 读取数据
    /// <summary>
    /// 读取指定节点的数据
    /// </summary>
    /// <param name="node">节点</param>
    /// 使用示列:
    /// XMLProsess.Read("/Node", "")
    /// XMLProsess.Read("/Node/Element[@Attribute='Name']")
    public string Read(string node)
    {
        string value = "";
        try
        {
            XmlDocument doc = XMLLoad();
            XmlNode xn = doc.SelectSingleNode(node);
            value = xn.InnerText;
        }
        catch { }
        return value;
    }

    /// <summary>
    /// 读取指定路径和节点的串联值
    /// </summary>
    /// <param name="path">路径</param>
    /// <param name="node">节点</param>
    /// <param name="attribute">属性名，非空时返回该属性值，否则返回串联值</param>
    /// 使用示列:
    /// XMLProsess.Read(path, "/Node", "")
    /// XMLProsess.Read(path, "/Node/Element[@Attribute='Name']")
    public static string Read(string path, string node)
    {
        string value = "";
        try
        {
            XmlDocument doc = XMLLoad(path);
            XmlNode xn = doc.SelectSingleNode(node);
            value = xn.InnerText;
        }
        catch { }
        return value;
    }

    /// <summary>
    /// 读取指定路径和节点的属性值
    /// </summary>
    /// <param name="path">路径</param>
    /// <param name="node">节点</param>
    /// <param name="attribute">属性名，非空时返回该属性值，否则返回串联值</param>
    /// 使用示列:
    /// XMLProsess.Read(path, "/Node", "")
    /// XMLProsess.Read(path, "/Node/Element[@Attribute='Name']", "Attribute")
    public static string Read(string path, string node, string attribute)
    {
        string value = "";
        try
        {
            XmlDocument doc = XMLLoad(path);
            XmlNode xn = doc.SelectSingleNode(node);
            value = (attribute.Equals("") ? xn.InnerText : xn.Attributes[attribute].Value);
        }
        catch { }
        return value;
    }

    /// <summary>
    /// 获取某一节点的所有孩子节点的值
    /// </summary>
    /// <param name="node">要查询的节点</param>
    public string[] ReadAllChildallValue(string node)
    {
        int i = 0;
        string[] str = { };
        XmlDocument doc = XMLLoad();
        XmlNode xn = doc.SelectSingleNode(node);
        XmlNodeList nodelist = xn.ChildNodes;  //得到该节点的子节点
        if (nodelist.Count > 0)
        {
            str = new string[nodelist.Count];
            foreach (XmlElement el in nodelist)//读元素值
            {
                str[i] = el.Value;
                i++;
            }
        }
        return str;
    }

    /// <summary>
    /// 获取某一节点的所有孩子节点的值
    /// </summary>
    /// <param name="node">要查询的节点</param>
    public XmlNodeList ReadAllChild(string node)
    {
        XmlDocument doc = XMLLoad();
        XmlNode xn = doc.SelectSingleNode(node);
        XmlNodeList nodelist = xn.ChildNodes;  //得到该节点的子节点
        return nodelist;
    }

    /// <summary> 
    /// 读取XML返回经排序或筛选后的DataView
    /// </summary>
    /// <param name="strWhere">筛选条件，如:"name='kgdiwss'"</param>
    /// <param name="strSort"> 排序条件，如:"Id desc"</param>
    public DataView GetDataViewByXml(string strWhere, string strSort)
    {
        try
        {
            string XMLFile = this.XMLPath;
            string filename = AppDomain.CurrentDomain.BaseDirectory.ToString() + XMLFile;
            DataSet ds = new DataSet();
            ds.ReadXml(filename);
            DataView dv = new DataView(ds.Tables[0]); //创建DataView来完成排序或筛选操作	
            if (strSort != null)
            {
                dv.Sort = strSort; //对DataView中的记录进行排序
            }
            if (strWhere != null)
            {
                dv.RowFilter = strWhere; //对DataView中的记录进行筛选，找到我们想要的记录
            }
            return dv;
        }
        catch (Exception)
        {
            return null;
        }
    }

    /// <summary>
    /// 读取XML返回DataSet
    /// </summary>
    /// <param name="strXmlPath">XML文件相对路径</param>
    public DataSet GetDataSetByXml(string strXmlPath)
    {
        try
        {
            DataSet ds = new DataSet();
            ds.ReadXml(GetXmlFullPath(strXmlPath));
            if (ds.Tables.Count > 0)
            {
                return ds;
            }
            return null;
        }
        catch (Exception)
        {
            return null;
        }
    }
    #endregion

    #region 插入数据
    /// <summary>
    /// 插入数据
    /// </summary>
    /// <param name="path">路径</param>
    /// <param name="node">节点</param>
    /// <param name="element">元素名，非空时插入新元素，否则在该元素中插入属性</param>
    /// <param name="attribute">属性名，非空时插入该元素属性值，否则插入元素值</param>
    /// <param name="value">值</param>
    /// 使用示列:
    /// XMLProsess.Insert(path, "/Node", "Element", "", "Value")
    /// XMLProsess.Insert(path, "/Node", "Element", "Attribute", "Value")
    /// XMLProsess.Insert(path, "/Node", "", "Attribute", "Value")
    public static void Insert(string path, string node, string element, string attribute, string value)
    {
        try
        {
            XmlDocument doc = new XmlDocument();
            doc.Load(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
            XmlNode xn = doc.SelectSingleNode(node);
            if (element.Equals(""))
            {
                if (!attribute.Equals(""))
                {
                    XmlElement xe = (XmlElement)xn;
                    xe.SetAttribute(attribute, value);
                }
            }
            else
            {
                XmlElement xe = doc.CreateElement(element);
                if (attribute.Equals(""))
                    xe.InnerText = value;
                else
                    xe.SetAttribute(attribute, value);
                xn.AppendChild(xe);
            }
            doc.Save(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
        }
        catch { }
    }

    /// <summary>
    /// 插入数据
    /// </summary>
    /// <param name="path">路径</param>
    /// <param name="node">节点</param>
    /// <param name="element">元素名，非空时插入新元素，否则在该元素中插入属性</param>
    /// <param name="strList">由XML属性名和值组成的二维数组</param>
    public static void Insert(string path, string node, string element, string[][] strList)
    {
        try
        {
            XmlDocument doc = new XmlDocument();
            doc.Load(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
            XmlNode xn = doc.SelectSingleNode(node);
            XmlElement xe = doc.CreateElement(element);
            string strAttribute = "";
            string strValue = "";
            for (int i = 0; i < strList.Length; i++)
            {
                for (int j = 0; j < strList[i].Length; j++)
                {
                    if (j == 0)
                        strAttribute = strList[i][j];
                    else
                        strValue = strList[i][j];
                }
                if (strAttribute.Equals(""))
                    xe.InnerText = strValue;
                else
                    xe.SetAttribute(strAttribute, strValue);
            }
            xn.AppendChild(xe);
            doc.Save(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
        }
        catch { }
    }

    /// <summary>
    /// 插入一行数据
    /// </summary>
    /// <param name="strXmlPath">XML文件相对路径</param>
    /// <param name="Columns">要插入行的列名数组，如：string[] Columns = {"name","IsMarried"};</param>
    /// <param name="ColumnValue">要插入行每列的值数组，如：string[] ColumnValue={"XML大全","false"};</param>
    /// <returns>成功返回true,否则返回false</returns>
    public static bool WriteXmlByDataSet(string strXmlPath, string[] Columns, string[] ColumnValue)
    {
        try
        {
            //根据传入的XML路径得到.XSD的路径，两个文件放在同一个目录下
            string strXsdPath = strXmlPath.Substring(0, strXmlPath.IndexOf(".")) + ".xsd";
            DataSet ds = new DataSet();
            ds.ReadXmlSchema(GetXmlFullPath(strXsdPath)); //读XML架构，关系到列的数据类型
            ds.ReadXml(GetXmlFullPath(strXmlPath));
            DataTable dt = ds.Tables[0];
            DataRow newRow = dt.NewRow();                 //在原来的表格基础上创建新行
            for (int i = 0; i < Columns.Length; i++)      //循环给一行中的各个列赋值
            {
                newRow[Columns[i]] = ColumnValue[i];
            }
            dt.Rows.Add(newRow);
            dt.AcceptChanges();
            ds.AcceptChanges();
            ds.WriteXml(GetXmlFullPath(strXmlPath));
            return true;
        }
        catch (Exception)
        {
            return false;
        }
    }
    #endregion

    #region 修改数据
    /// <summary>
    /// 修改指定节点的数据
    /// </summary>
    /// <param name="node">节点</param>
    /// <param name="value">值</param>
    public void Update(string node, string value)
    {
        try
        {
            XmlDocument doc = XMLLoad();
            XmlNode xn = doc.SelectSingleNode(node);
            xn.InnerText = value;
            doc.Save(AppDomain.CurrentDomain.BaseDirectory.ToString() + XMLPath);
        }
        catch { }
    }

    /// <summary>
    /// 修改指定节点的数据
    /// </summary>
    /// <param name="path">路径</param>
    /// <param name="node">节点</param>
    /// <param name="value">值</param>
    /// 使用示列:
    /// XMLProsess.Insert(path, "/Node","Value")
    /// XMLProsess.Insert(path, "/Node","Value")
    public static void Update(string path, string node, string value)
    {
        try
        {
            XmlDocument doc = XMLLoad(path);
            XmlNode xn = doc.SelectSingleNode(node);
            xn.InnerText = value;
            doc.Save(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
        }
        catch { }
    }

    /// <summary>
    /// 修改指定节点的属性值(静态)
    /// </summary>
    /// <param name="path">路径</param>
    /// <param name="node">节点</param>
    /// <param name="attribute">属性名，非空时修改该节点属性值，否则修改节点值</param>
    /// <param name="value">值</param>
    /// 使用示列:
    /// XMLProsess.Insert(path, "/Node", "", "Value")
    /// XMLProsess.Insert(path, "/Node", "Attribute", "Value")
    public static void Update(string path, string node, string attribute, string value)
    {
        try
        {
            XmlDocument doc = XMLLoad(path);
            XmlNode xn = doc.SelectSingleNode(node);
            XmlElement xe = (XmlElement)xn;
            if (attribute.Equals(""))
                xe.InnerText = value;
            else
                xe.SetAttribute(attribute, value);
            doc.Save(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
        }
        catch { }
    }

    /// <summary>
    /// 更改符合条件的一条记录
    /// </summary>
    /// <param name="strXmlPath">XML文件路径</param>
    /// <param name="Columns">列名数组</param>
    /// <param name="ColumnValue">列值数组</param>
    /// <param name="strWhereColumnName">条件列名</param>
    /// <param name="strWhereColumnValue">条件列值</param>
    public static bool UpdateXmlRow(string strXmlPath, string[] Columns, string[] ColumnValue, string strWhereColumnName, string strWhereColumnValue)
    {
        try
        {
            string strXsdPath = strXmlPath.Substring(0, strXmlPath.IndexOf(".")) + ".xsd";
            DataSet ds = new DataSet();
            ds.ReadXmlSchema(GetXmlFullPath(strXsdPath));//读XML架构，关系到列的数据类型
            ds.ReadXml(GetXmlFullPath(strXmlPath));

            //先判断行数
            if (ds.Tables[0].Rows.Count > 0)
            {
                for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
                {
                    //如果当前记录为符合Where条件的记录
                    if (ds.Tables[0].Rows[i][strWhereColumnName].ToString().Trim().Equals(strWhereColumnValue))
                    {
                        //循环给找到行的各列赋新值
                        for (int j = 0; j < Columns.Length; j++)
                        {
                            ds.Tables[0].Rows[i][Columns[j]] = ColumnValue[j];
                        }
                        ds.AcceptChanges();                     //更新DataSet
                        ds.WriteXml(GetXmlFullPath(strXmlPath));//重新写入XML文件
                        return true;
                    }
                }

            }
            return false;
        }
        catch (Exception)
        {
            return false;
        }
    }
    #endregion

    #region 删除数据
    /// <summary>
    /// 删除节点值
    /// </summary>
    /// <param name="path">路径</param>
    /// <param name="node">节点</param>
    /// <param name="attribute">属性名，非空时删除该节点属性值，否则删除节点值</param>
    /// <param name="value">值</param>
    /// 使用示列:
    /// XMLProsess.Delete(path, "/Node", "")
    /// XMLProsess.Delete(path, "/Node", "Attribute")
    public static void Delete(string path, string node)
    {
        try
        {
            XmlDocument doc = XMLLoad(path);
            XmlNode xn = doc.SelectSingleNode(node);
            xn.ParentNode.RemoveChild(xn);
            doc.Save(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
        }
        catch { }
    }

    /// <summary>
    /// 删除数据
    /// </summary>
    /// <param name="path">路径</param>
    /// <param name="node">节点</param>
    /// <param name="attribute">属性名，非空时删除该节点属性值，否则删除节点值</param>
    /// <param name="value">值</param>
    /// 使用示列:
    /// XMLProsess.Delete(path, "/Node", "")
    /// XMLProsess.Delete(path, "/Node", "Attribute")
    public static void Delete(string path, string node, string attribute)
    {
        try
        {
            XmlDocument doc = XMLLoad(path);
            XmlNode xn = doc.SelectSingleNode(node);
            XmlElement xe = (XmlElement)xn;
            if (attribute.Equals(""))
                xn.ParentNode.RemoveChild(xn);
            else
                xe.RemoveAttribute(attribute);
            doc.Save(AppDomain.CurrentDomain.BaseDirectory.ToString() + path);
        }
        catch { }
    }

    /// <summary>
    /// 删除所有行
    /// </summary>
    /// <param name="strXmlPath">XML路径</param>
    public static bool DeleteXmlAllRows(string strXmlPath)
    {
        try
        {
            DataSet ds = new DataSet();
            ds.ReadXml(GetXmlFullPath(strXmlPath));
            if (ds.Tables[0].Rows.Count > 0)
            {
                ds.Tables[0].Rows.Clear();
            }
            ds.WriteXml(GetXmlFullPath(strXmlPath));
            return true;
        }
        catch (Exception)
        {
            return false;
        }
    }

    /// <summary>
    /// 通过删除DataSet中指定索引行，重写XML以实现删除指定行
    /// </summary>
    /// <param name="iDeleteRow">要删除的行在DataSet中的Index值</param>
    public static bool DeleteXmlRowByIndex(string strXmlPath, int iDeleteRow)
    {
        try
        {
            DataSet ds = new DataSet();
            ds.ReadXml(GetXmlFullPath(strXmlPath));
            if (ds.Tables[0].Rows.Count > 0)
            {
                ds.Tables[0].Rows[iDeleteRow].Delete();
            }
            ds.WriteXml(GetXmlFullPath(strXmlPath));
            return true;
        }
        catch (Exception)
        {
            return false;
        }
    }

    /// <summary>
    /// 删除指定列中指定值的行
    /// </summary>
    /// <param name="strXmlPath">XML相对路径</param>
    /// <param name="strColumn">列名</param>
    /// <param name="ColumnValue">指定值</param>
    public static bool DeleteXmlRows(string strXmlPath, string strColumn, string[] ColumnValue)
    {
        try
        {
            DataSet ds = new DataSet();
            ds.ReadXml(GetXmlFullPath(strXmlPath));
            if (ds.Tables[0].Rows.Count > 0)
            {
                //判断行多还是删除的值多，多的for循环放在里面
                if (ColumnValue.Length > ds.Tables[0].Rows.Count)
                {
                    for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
                    {
                        for (int j = 0; j < ColumnValue.Length; j++)
                        {
                            if (ds.Tables[0].Rows[i][strColumn].ToString().Trim().Equals(ColumnValue[j]))
                            {
                                ds.Tables[0].Rows[i].Delete();
                            }
                        }
                    }
                }
                else
                {
                    for (int j = 0; j < ColumnValue.Length; j++)
                    {
                        for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
                        {
                            if (ds.Tables[0].Rows[i][strColumn].ToString().Trim().Equals(ColumnValue[j]))
                            {
                                ds.Tables[0].Rows[i].Delete();
                            }
                        }
                    }
                }
                ds.WriteXml(GetXmlFullPath(strXmlPath));
            }
            return true;
        }
        catch (Exception)
        {
            return false;
        }
    }
    #endregion
}